diff --git a/webui/src/App.tsx b/webui/src/App.tsx
index de6e308..6b9cbdc 100644
--- a/webui/src/App.tsx
+++ b/webui/src/App.tsx
@@ -78,6 +78,7 @@ import {
   countNodesBySection,
   type NodeSectionCounts,
 } from './sidebarCounts'
+import { documentTitleFor, SECTION_TITLES } from './documentTitle'
 import {
   isResourceSectionId,
   navigateTo,
@@ -112,18 +113,6 @@ const NAV_ITEMS: ReadonlyArray<{ id: SectionId; label: string }> = [
   { id: 'vms', label: 'Virtual Machines' },
 ]
 
-const SECTION_TITLES: Record<SectionId, string> = {
-  overview: 'Overview',
-  vms: 'Virtual Machines',
-  docker: 'Docker',
-  containers: 'Containers',
-  logs: 'Logs',
-  profile: 'Profile',
-  configuration: 'Configuration',
-  setup: 'Setup',
-  login: 'Sign in',
-}
-
 const CONFIG_TABS: ReadonlyArray<{ id: ConfigTabId; label: string }> = [
   { id: 'overview', label: 'Overview' },
   { id: 'users', label: 'Users' },
@@ -3906,6 +3895,22 @@ function App() {
     }
   }, [bootState.kind])
 
+  useEffect(() => {
+    if (bootState.kind === 'loading') {
+      document.title = documentTitleFor('loading')
+      return
+    }
+    if (bootState.kind === 'setup') {
+      document.title = documentTitleFor('setup')
+      return
+    }
+    if (bootState.kind === 'login') {
+      document.title = documentTitleFor('login')
+      return
+    }
+    document.title = documentTitleFor(activeSection)
+  }, [bootState.kind, activeSection])
+
   function goToSection(section: SectionId) {
     if (section === 'setup' || section === 'login') {
       return
diff --git a/webui/src/documentTitle.test.ts b/webui/src/documentTitle.test.ts
new file mode 100644
index 0000000..5b12624
--- /dev/null
+++ b/webui/src/documentTitle.test.ts
@@ -0,0 +1,35 @@
+import { describe, expect, it } from 'vitest'
+import { documentTitleFor, SECTION_TITLES } from './documentTitle'
+
+describe('documentTitleFor', () => {
+  it('returns the app name alone while loading', () => {
+    expect(documentTitleFor('loading')).toBe('ClusterCanvas')
+  })
+
+  it('formats category titles for main sections', () => {
+    expect(documentTitleFor('overview')).toBe('ClusterCanvas - Overview')
+    expect(documentTitleFor('vms')).toBe('ClusterCanvas - Virtual Machines')
+    expect(documentTitleFor('docker')).toBe('ClusterCanvas - Docker')
+    expect(documentTitleFor('containers')).toBe('ClusterCanvas - Containers')
+    expect(documentTitleFor('logs')).toBe('ClusterCanvas - Logs')
+    expect(documentTitleFor('profile')).toBe('ClusterCanvas - Profile')
+    expect(documentTitleFor('configuration')).toBe(
+      'ClusterCanvas - Configuration',
+    )
+  })
+
+  it('formats titles for setup and sign-in', () => {
+    expect(documentTitleFor('setup')).toBe('ClusterCanvas - Setup')
+    expect(documentTitleFor('login')).toBe('ClusterCanvas - Sign in')
+  })
+
+  it('uses SECTION_TITLES for every section id', () => {
+    for (const section of Object.keys(SECTION_TITLES) as Array<
+      keyof typeof SECTION_TITLES
+    >) {
+      expect(documentTitleFor(section)).toBe(
+        `ClusterCanvas - ${SECTION_TITLES[section]}`,
+      )
+    }
+  })
+})
diff --git a/webui/src/documentTitle.ts b/webui/src/documentTitle.ts
new file mode 100644
index 0000000..96884f6
--- /dev/null
+++ b/webui/src/documentTitle.ts
@@ -0,0 +1,22 @@
+import type { SectionId } from './navigation'
+
+export const SECTION_TITLES: Record<SectionId, string> = {
+  overview: 'Overview',
+  vms: 'Virtual Machines',
+  docker: 'Docker',
+  containers: 'Containers',
+  logs: 'Logs',
+  profile: 'Profile',
+  configuration: 'Configuration',
+  setup: 'Setup',
+  login: 'Sign in',
+}
+
+const APP_TITLE = 'ClusterCanvas'
+
+export function documentTitleFor(section: SectionId | 'loading'): string {
+  if (section === 'loading') {
+    return APP_TITLE
+  }
+  return `${APP_TITLE} - ${SECTION_TITLES[section]}`
+}